Use parentheses and `...' where appropriate

Remove some stray usage of other bracket types and asterisks for the
same purpose.

Signed-off-by: Štěpán Němec <stepnem@gmail.com>
Acked-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/Documentation/git-fetch.txt b/Documentation/git-fetch.txt
index 400fe7f..d159e88 100644
--- a/Documentation/git-fetch.txt
+++ b/Documentation/git-fetch.txt
@@ -12,7 +12,7 @@
 
 'git fetch' [<options>] <group>
 
-'git fetch' --multiple [<options>] [<repository> | <group>]...
+'git fetch' --multiple [<options>] [(<repository> | <group>)...]
 
 'git fetch' --all [<options>]